[cs615asa] What's the X.509 certificate used for?

hchen29 hchen29 at stevens.edu
Tue Jan 27 12:36:23 EST 2015

 From the article online "How To: Getting Started with Amazon EC2", there 
is a X.509 certificate should be downloaded first and a private key as 
well. I want to know what this is used for. I think if we want to launch 
an EC2 instance with ssh, we should produce another key-pair. So i'm 
confused with this X.509 certificate and the private key gerated at the 

Hanxiong Chen,

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